CWDM Optical Add Drop Multiplexer


  • Card designed for FRM220 platform that supports CWDM wavelengths between 1271nm to 1611nm
  • Takes a single wavelength from a trunk, pulls the signal out, and allows a new signal at the same wavelength to be inserted into the trunk at the same spot.
  • All the other wavelengths pass through the Add/Drop Multiplexer with only a small loss of power (typically < 2.5dB including connectors and adapters).
  • Modules are passive devices that require no external power.
  • Can also be installed in an FRM220 powered chassis with a NMC management module and can be managed via HTTP/SNMP or SmartView EMS network management software, Telnet or a serial console port.
  • Modules can be installed in any FRM220 chassis equipped with other FRM220 media converters and transponders to provide a multiservice platform capable of delivering Ethernet, TDM, Voice and other services across a CWDM enabled network


Item Description
Number of channels

CWDM: 1 add/drop channel, 2 add/drop channels

Operating Channel CWDM add & drop channel

Any channels out of 1471, 1491, 1511, 1531, 1551, 1571, 1591, 1611 nm (to be defined via order information)

Channel width: CWDM channels

>=13nm (around centre wavelength)

Insertion Loss

IN-OUT >= 2.5 dB
Add to Drop < 2.0 dB


CWDM adjacent channel Isolation >= 30dB
CWDM non-adjacent ch’s at CWDM drop port >= 35dB

Optical Return Loss

>= 50dB


>= 0.1dB


Temperature : 0 ~ 50°C (Operating), -20 ~ 70°C (Storage)

Fibre Type

9 / 125 / 250um


162 x 220 x 25mm (W x D x H)


FCC part 15 class A, CE Mark

Ordering Information

Order Code Description
CT-FRM220-OADM-W5961-E6159 1ch one fibre CWDM OADM-West T59/R61 East T61/R59
CT-FRM220-OADM-W5153-E5351 1ch one fibre CWDM OADM–West 51T/53R East 53T/51R
CT-FRM220-OADM-W4345-E4543 1ch one fibre CWDM OADM–West T43/R45 East T45/R43
CT-FRM220-OADM-W3133-E3331 1ch one fibre CWDM OADM–West T31/R33 East T33/R31
CT-FRM220-OADM-W5557-E5755 1ch one fibre CWDM OADM–West T55/R57 East T57/R55
CT-FRM220-OADM-W4749-E4947 1ch one fibre CWDM OADM–West T47/R49 East T49/R47
CT-FRM220-OADM-W3537-E3735 1ch one fibre CWDM OADM–West T35/R37 East T37/R35
CT-FRM220-OADM-W2729-E2927 1ch one fibre CWDM OADM–West T27/R29 East T29/R27
CT-FRM220-OADM-47 1ch two fibre CWDM OADM 1471nm with West/East lines
CT-FRM220-OADM-49 1ch two fibre CWDM OADM 1491nm with West/East lines
CT-FRM220-OADM-51 1ch two fibre CWDM OADM 1511nm with West/East lines
CT-FRM220-OADM-53 1ch two fibre CWDM OADM 1531nm with West/East lines
CT-FRM220-OADM-55 1ch two fibre CWDM OADM 1551nm with West/East lines
CT-FRM220-OADM-57 1ch two fibre CWDM OADM 1571nm with West/East lines
CT-FRM220-OADM-59 1ch two fibre CWDM OADM 1591nm with West/East lines
CT-FRM220-OADM-61 1ch two fibre CWDM OADM 1611nm with West/East lines

More Information

Chassis and mounting options for the FRM220 family.

AC and DC power options available.  See individual products for further details.

1 Slot standalone chassis for ISDN, voice or data modules, AC or DC
1 Slot chassis with DB9 console port for Ethernet, voice or serial cards
2 Slot Ethernet, ISDN and serial chassis with console port
2 Slot chassis manageable via NMC card
4 slot Ethernet, ISDN and serial chassis, 1U
8 Slot multi service rack, 1U
20 Slot multi function chassis with Ethernet, serial and ISDN, 2u
20 Slot Ethernet aggregation rack, 2u